VW-20 on the antenna wire.
71-8590 (into radio)
I recommend you call the guy. 713-626-7631 just to be sure you are getting exactly what you need. The wires are marked and / or there is a schematic of the plug wiring attached.
Pretty ez except for figuring out the plug onto the radio. There is a sliding lock thing that you need to figure out. Hope this helps.
Mike Holbrook
Meridian, Idaho
1992 535im, 17", Euro M5 Throwing Stars 8's & 9's, FK-451 235/45s & 255/40s, M5 Sway Bars 25/20, Conforti chip, Lowes Ram Air, glass sunroof